In order to have proper visualization in the VR mode, both tracking targets have to be in the field of view of the optical tracking head of the Freehand SPECT system. Furthermore, the presence of many people around the patient in the sterile field increases the chance of occlusion. Thanks to the flexible design of the camera head, its placement and orientation can be changed to overcome these is-sues. However, in the VR view mode this can be more challenging, compared to AR, due to the necessity to track both targets.